Hello Rachel!
I have visited your website and didn’t found the problem you described. (Please see the video)
Anyway, this type of problem can be easily caused by some of the plugins you additionally installed/activated…
(I have inspected your page and found that there are some warnings related to flex slider and jetpack.)
To check if that is not the case, please deactivate ALL plugins temporarily, and if then the website works normally, activate the plugins one by one until the problem reappears so on that way you will find which plugins caused the error(if any).
What OS/Browser do you using?
Have you tried to open the webpage on another computer?
Regards